package thread;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class ThreadPoolDemo {
    public static void main(String[] args) {
        ExecutorService threadPool= Executors.newFixedThreadPool(4);
        for (int i=0;i<5;i++){
            Runnable runnable=new Runnable() {
                public void run() {
                    Thread t=Thread.currentThread();
                    System.out.println(t.getName()+"正在执行一个任务");
                    try {
                        Thread.sleep(5000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    System.out.println(t.getName()+"任务执行完毕!");
                }
            };
         threadPool.execute(runnable);
            System.out.println("将一个任务交给了线程池");
        }
        threadPool.shutdown();
        //threadPool.shutdownNow();
        System.out.println("线程池停止了");
    }
}
